Hydriding and dehydriding reaction rate of FeTi intermetallic compound

Fundamentals of Superior Properties in Bulk NanoSPD Materials

“…There have been many attempts to overcome this limitation. [112][113][114][115][116][117][118][119][120] Recent studies have shown that SPD processing is the way to achieve that, as such an activation process is no longer required when the TiFe is pre-processed by HPT ( Figure 15). [121] Furthermore, the HPT-processed sample is not deactivated even after storage in air for a prolonged period of time.…”

Hydrogenation of a TiFe-based alloy at high pressures and temperatures

“…2(a). The small peaks correspond to the Bragg peaks from NaCl and the C15 Laves phase [7]. The arrows indicate the 111 and 210 peaks from the CsCl-type structure, whose intensities decreased with increasing volume of the hydride during hydrogenation; these peaks were hardly observable when the hydride became a single phase [top profile, Fig.…”

“…In the present study, we chose a ternary TiFe 0.8 Mn 0.2 alloy because it is highly reactive for hydrogenation comparable to LaNi 5 [6,7]. Previous studies have reported that substituting Fe for Mn improves the activation properties of the TiFe alloy and the kinetics of absorption and desorption of the ternary alloy is faster than that of the binary alloy [6e8].…”

Tailoring the Kinetic Behavior of Hydride Forming Materials for Hydrogen Storage

“…In the case of room temperature hydrides, the presence of transition metals like Pd and Ni notably improves their activation behavior and kinetic properties. This fact was attributed to the active sites of these transition metals, located on the metal or alloy surface, which facilitated the hydrogen molecule dissociation and penetration across the oxides generated on the metal or alloy surface [67][68][69]. These hydrides are commonly prepared by arc melting since, as mentioned in Section 4.2, the milling process can cause hydrogen capacity losses.…”